Metro

Brooklyn fire was started by angry boyfriend, cops say

The Brooklyn inferno that nearly killed four children who were rescued by a rookie firefighter was set by an enraged boyfriend of one of the residents, police said Monday.

Thaddeus Boone, 22, of Newark, broke into his 18-year-old girlfriend’s fifth-floor apartment in the Wyckoff Houses at around 1:30 a.m. Sunday and put a lighter to clothing and curtains in a hallway and a bedroom, police sources said.

His girlfriend’s 5-month-old brother was inside and suffered serious injuries before firefighter Jordan Sullivan, 36, saved him, officials said. Sullivan and other members of Ladder 105 in Brooklyn pulled the baby boy and three more children, as well as their grandmother, to safety.

Cops arrested Boone in Carroll Gardens on Monday.